RQDXE Expander Module User's Guide

This document is the "RQDXE Expander Module User's Guide" (EK-RQDXE-UG-002) from Digital Equipment Corporation, published in 1985/1986.

The guide provides instructions for installing and configuring the RQDXE dual-height expander module (M7513), which is a replacement for the older RQDX1-E module.

The core purpose of the RQDXE module is to expand RQDXn (RQDX1, RQDX2, RQDX3) controller modules, allowing them to support up to four external mass storage control protocol (MSCP) devices, such as RD5n and RX50 drives. The module facilitates the transmission of controller signals to these external devices.

Key topics covered in the guide include:

• Description of the RQDXE module and its function.
• Cabling Options: Detailed information on the two available options (RQDXE-AA and RQDXE-FA) for connecting the RQDXE to RQDXn controllers and different system configurations (e.g., BA23-A CPU box, BA23-C expansion box).
• Module Specifications: Physical dimensions, power consumption, operating temperature, humidity, and altitude requirements.
• Jumper Configurations: Comprehensive instructions and diagrams for setting the jumpers on the RQDXE module to properly configure it for various system setups and external drive types.

The document emphasizes that the RQDXE module should be installed in a backplane slot directly below or next to the corresponding RQDXn controller. It also includes standard legal notices, such as FCC compliance and trademark information.